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No notes for slide. Epoxy Coating Comparison Chart Description Form very hard, adherent films with excellent chemical and corrosion resistance. Amine cured epoxies are often used as protective coatings and linings in highly corrosive environ- ments. Amine epoxies require care in handling since the amines can be moderately irritating to the skin, and may cause allergic reactions. Polyamide epoxies generally offer the widest latitude in coating formulation.
They are considered more resilient and flexible, and have better weathering resistance and a longer pot life than amine cured epoxies. Polyamide epoxies generally have less solvent and acid resistance than amine cured epoxies. Amidoamines are reaction products of a polyamine and a fatty acid. Their properties generally fall between those of amines and polyamides. They have good water and corrosion resistance like amines, and good toughness like polyamides. They have relatively small molecular size giving them low visc- osities and making them very good surface wetters.
These coatings allow wide range formulating latitude. Novolac epoxy resin increases chemical resistance and solvent resistance.
Increasing the level of phenolic increases the chemical and solvent resistance, but the coating loses flexibility. Some phenolics require heat curing. Epoxy Coating Comparison Chart Description Siloxane epoxies are rela- tively fast curing coatings with excellent stain and mar resistance.
They have excellent color and gloss stability. Siloxane epoxies are typically used in high performance industrial applications. Also accept- able for architectural applications. Coal tar epoxies are a combination of a basic epoxy resin and coal tar.
The coal tar is in the form of a semi-liquid pitch and blended with the epoxy resin. The curing agents for coal tar epoxies are usually either amines or polyamides. Coal tar epoxies offer excellent resistance to fresh and salt water and are highly resistant to cathodic disbondment. Generally consist of a non-yellowing acrylic resin disbursed in water mixed with an emulsified epoxy resin.
They are relatively hard, durable coatings with moderate chemical resistance. They offer good stain resistance, abrasion resistance and resistance to most commercial cleaning agents and sanitizers. They can be used over previously applied conventional paints to upgrade the surface for better performance without wrinkling, lifting or bleeding. A combination of epoxy resin and alkyd resin resulting in an air-drying coating. Epoxy esters provide a hard, durable film ideal as a machinery finish. Recommended for general atmospheric use in areas not considered severely corrosive.
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NSF-Approved Dura-Plate® Coatings From Sherwin-Williams
As home to the University of Iowa, Iowa City lays claim to many "big city" attributes: thriving arts, good hospitals, enviable educational resources, and flourishing businesses and industry. Iowa City's population fluctuates regularly due to the arrival and departure of its college students -- some 30, in number -- during the year. As a result, water consumption and treatment fluctuate. Ten years in planning, the new water plant went online percent on March 7, , designed to better serve Iowa City's growing population. It is also designed to meet ever-increasing state and federal drinking water quality standards, and to improve the taste and odor of the water supply for the area's Hawkeye State citizens. The previous treatment plant, which the new facility has replaced, was nearly years old.
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